add golden_output4 to changelog

Author: AJ Cruz

changelog/undistributed/changelog_fix_show_cts_iosxe_20200807212611.rst

@@ -10,4 +10,5 @@
         * Updated regex pattern p3 to also match CTS disabled status
         * Added conditional to cts_dict so mode key is not generated if cts is disabled
     * Modified golden_output2_expected test data
-        * Added expected output for Port-channel interfaces
+        * Added expected output for Port-channel interfaces
+    * Added golden_output4 test data & expected results